Dovre ASTRO 3MFWB Owner's manual

INSTALLATIEVOORSCHRIFTEN EN GEBRUIKSAANWIJZING

HOUTKACHEL

INSTALLATION INSTRUCTIONS AND OPERATING MANUAL

WOOD STOVE

INSTALLATION ET MODE D’EMPLOI

POELE A BOIS

EINBAUANLEITUNG UND GEBRAUCHSANWEISUNG

HOLZ-FEUERSTÄTTE

INSTRUCCIONES DE INSTALACIÓN Y USO

ESTUFA DE LEÑA

ASTRO 3MFP

ASTRO 3MFWB

ASTRO 4MFP

ASTRO 4MFWB

03.27662.100 - 03/2013

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Table of contents

Introduction 3

Declaration of conformity 3

Safety 4

Installation requirements 4

General 4

Chimney (flue) 4

Ventilation of the area 5

Floors and walls 6

Product description 6

Installation 6

General preparation 6

Preparing the connection to the flue 8

Preparing the outside air connection 9

Installing and connecting 11

Use 11

First use 11

Fuel 11

Lighting 12

Burning wood 12

Burning brown coal briquettes 13

Burning anthracite coal 13

Controlling combustion air 14

Extinguishing the fire 15

Removing ashes 15

Fog and mist 15

problems 16

Maintenance 16

Chimney 16

Cleaning and other regular maintenance activ-

ities 16

Appendix 1: Technical Data 18

Appendix 2: Measurements 20

Appendix 3: Distance from combustible

material 24

Appendix 4: Diagnostic diagram 28

Index 29

2

Subject to change because of technical improvements

Introduction

Dear user,

In buying this DOVRE heating appliance, you have

chosen a high quality product. This product is part of a

new generation of energy-efficient and

environmentally-friendly heating appliances. These

appliances make optimum use of convection heat as

well as thermal radiation (radiant heat).

Your DOVRE appliance has been manufactured

with state-of-the-art production equipment. In the

unlikely event of a malfunction, you can always

rely on DOVRE for support and service.

The appliance should not be modified; please

always use original parts.

The appliance is intended for use in a living room. It

should be connected hermetically to a well-

functioning chimney.

We advise you have the appliance installed by an

authorized and competent installer.

DOVRE cannot be held liable for any problems or

damage resulting from incorrect installation.

Observe the following safety regulations when

installing and using the appliance.

In this manual, you can read how the DOVRE heating

appliance can be installed, used and maintained

safely. Should you require additional information or

technical data, or should you experience an

installation problem, please first contact your supplier.

Declaration of

conformity

Notified body: 1625

The undersigned

Dovre nv, Nijverheidsstraat 18 B-2381 Weelde hereby

declares

that houtkachel Astro 3MFP, Astro 3MFWB, Astro

4MFP en Astro 4MFWB have been produced in

accordance with EN 13240.

Weelde 01-03-2013

Due to continuous product improvement, the supplied

appliance specifications may vary from the

description in this brochure without prior notice.

DOVRE N.V.

Nijverheidsstraat 18 Tel: +32 (0) 14 65 91 91

B-2381 Weelde Fax: +32 (0) 14 65 90 09

Belgium E-mail : info@dovre.be

Subject to change because of technical improvements

3

Safety

Please note: All safety regulations must be

complied with strictly.

Please read carefully the instructions supplied

with the appliance for installation, use and

maintenance, before using the appliance.

The appliance must be installed in accordance

with the laws and requirements of your

country.

All local regulations and the regulations relating

to national and European standards must be

observed when installing the appliance.

The appliance should preferably be installed by

an authorized installer. Installers will be aware

of the applicable regulations and requirements.

The appliance is designed for heating

purposes. All surfaces, including the glass and

connecting tube, can get very hot (over 100°C)!

For operation, use a so-called "cold hand" or an

oven glove. Make sure there is sufficient

protection if young children, disabled persons

or old people are in the vicinity of the appliance.

Safety distances from flammable materials

must be adhered to strictly.

Don't place any curtains, clothes, laundry or

other combustible materials on or near the

appliance.

Don't use flammable or explosive substances

near the appliance when it is in use.

Avoid a chimney fire by having the chimney

swept regularly. Never burn wood with the door

open.

In the case of a chimney fire: close all air inlets

of the appliance and alert the fire brigade.

If the glass in the appliance is broken or

cracked, it must be replaced before you can

use the appliance again.

Make sure there is adequate ventilation in the

room where the appliance is installed. If

ventilation is insufficient, combustion will be

incomplete resulting in toxic gases being

produced and spread through the room. See

the chapter "Installation requirements" for more

information on ventilation.

Installation

requirements

General

The appliance must be connected tightly to a well-

functioning chimney.

For the connection measurements: see the

appendix "Technical data".

Ask the fire brigade and/or your insurance

company about any specific requirements and

regulations.

Chimney (flue)

The flue or chimney is needed for:

Removal of combustion gases via natural draught.

As the warm air in the flue or chimney is lighter

than the outside air, it rises.

Air intake, needed for the combustion of fuel in the

appliance.

A poorly-functioning flue or chimney can cause smoke

to escape into the room when the door is opened.

Damage caused by smoke emissions into the room is

not covered by the warranty.

Do not connect multiple appliances (such as a

boiler for central heating) to the same flue,

unless local or national regulations allow this.

In the event of two connections ensure that the

difference in height between the connections is

no less than 200 mm.

Ask your installer for advice regarding the flue. Refer

to the European norm EN13384 for a correct

calculations for the flue.

4

Subject to change because of technical improvements

The flue must satisfy the following requirements:

The flue or chimney must be made of fire-resistant

material, preferably ceramics or stainless steel.

The flue or chimney must be airtight and well-

cleaned and guarantee sufficient draught.

A draught/vacuum of 15-20Pa during normal

operation is ideal.

Starting from the flue spigot, the flue must run as

vertically as possible. Changes in direction and

horizontal pieces disrupt the outward flow of

combustion gases and may cause soot deposits.

To prevent combustion gases from cooling down

too much, which reduces the draught, ensure that

the interior diameter is not too big.

The flue or chimney should ideally have the same

diameter as the connection collar.

For the nominal diameter: see the appendix

"Technical data". If the smoke channel is well

insulated, the diameter may be slightly bigger

(up to 2x the section of the connection collar).

The section (area ) of the smoke channel must be

constant. Wider segments and (in particular)

narrower segments disrupt the outward flow of

combustion gases.

When using a cover plate or exhaust hood : make

sure that the cover does not restrict the flue outlet

and that the cap does not impede the outward flow

of combustion gases.

The flue must end in a zone that is not affected by

surrounding buildings, trees or other obstacles.

The flue outside the house must be insulated.

The chimney must be at least 4metres high.

As a rule of thumb: 60cm above the ridge of the

roof.

If the ridge of the roof is more than 3metres away

from the flue: stick to the measurements in the

following figure. A = the highest point of the roof

within a distance of 3metres.

Ventilation of the area

For good combustion, the stove needs air (oxygen).

This air is supplied via adjustable air inlets from the

area in which the stove is installed.

The combustion will be incomplete in case of

insufficient ventilation, which results in toxic

gases being produced and spread through the

area.

As a rule of thumb, the air supply should be 5,

5cm²/kW. Extra ventilation is needed when:

The stove is in an area that is well-insulated.

There is mechanical ventilation, for example a

central extraction system or an extraction hood in

an open kitchen.

You can provide extra ventilation by having a

ventilation louvre fitted on the outside wall.

Make sure that other air consuming appliances (such

as tumble-driers, other heating appliances or a

bathroom fan) have their own supply of outside air, or

are switched off when you use the appliance.

You can also connect the appliance to an

outside air supply. This makes additional

ventilation unnecessary.

Subject to change because of technical improvements

5

Floors and walls

The floor on which the appliance is placed must have

sufficient bearing capacity. For the weight of the

appliance, see the appendix "Technical data".

Protect flammable flooring from heat radiation

by means of a fireproof protective plate. See

the appendix "Distance from combustible

material".

Remove combustible material such as

linoleum, carpets/rugs and similar materials

below the fireproof protective plate.

Keep sufficient distance between the

appliance and combustible materials such as

wooden walls and furniture.

The connecting tube also radiates heat. Ensure

that there is sufficient distance or a shield

between the connecting tube and combustible

material.

The rule of thumb for a single-walled tube is a

distance of 3x the diameter. If a lining shell is

fitted around the tube, a distance of 1x the

diameter is permissible.

Carpets and rugs must be at least 80cm away

from the fire.

Use a fireproof floor plate to protect a

flammable floor from any ash which may fall in

front of the stove. The protective plate must

comply with national standards.

For the dimensions of the fireproof protective

plate: see the appendix "Distance from

combustible material".

For further requirements in connection with fire

safety: see the appendix "Distance from

combustible material".

Product description

1. Fire grate

2. Door

3. Primary air slide

4. Door latch

5. Secondary air slide

6. Riddling rod

Installation

General preparation

Please check the appliance immediately after

delivery for damage caused during transport or any

other damage or defects. The appliance is attached

to the pallet with screws at the bottom.

6

Subject to change because of technical improvements

If you detect damage caused during transport

or any other damage or defects, do not use the

appliance and notify the supplier.

Remove the removable parts (fire-resistant inner

plates, fire grate, top plate, ash pan) from the

appliance before you start installing the appliance.

It is easier to move the appliance and to avoid

damage if the removable parts have been

removed.

Note the location of the removable parts, so

that you can re-position the parts in the correct

place later on.

1. Open the door; see the following figure.

2. Remove the fire-resistant inner plates; see the

following figure.

Vermiculite inner plates are light and tend to be

ochrous in colour on delivery. They insulate the

combustion chamber to boost combustion.

Cast iron inner plates protect the combustion

chamber and dissipate heat to the

surroundings.

1

2

7

4

7

5

3

6

09.20019.033

Removable internal sections

astro3 series

1 03.77099.002 Fire basket front

2 03.77400.002 Fire basket left

3 03.77401.002 Fire basket right

4 03.08365.002 Inner plate

5 03.61115.100 Grate

6 03.66532.100 Fire grate

astro4 series

1 03.77099.002 Fire basket front

2 03.77402.002 Fire basket left

3 03.77403.002 Fire basket right

4 03.08365.002 Inner plate

5 03.61115.100 Grate

6 03.66532.100 Fire grate

7 03.35210.000 Corner piece

4. Remove the ash pan; see the following figure.

Subject to change because of technical improvements

7

Preparing the connection to

the flue

When connecting the stove to the flue, you can

choose to connect to the top or rear of the stove.

When the appliance is delivered, the

connection on the rear is left open.

Plug the outlet you don't wish to use with the

corresponding supplied cover.

Install the supplied corresponding connection collar

to the outlet you wish to use.

Sealant and materials are supplied.

1 Connection - top

2 Connection - rear

Connect to top

1. Remove the top plate.

The top plate can be taken off the appliance

just like that.

2. At the outlet at the top, apply sealant to the

contact surface where the connection collar will be

positioned.

3. Install the connection collar with the materials.

4. At the outlet at the rear, apply sealant to the

contact surface where the cover will be

positioned.

5. Install the cover using the materials.

8

Subject to change because of technical improvements

Connecting to the rear

1. Remove the top plate.

The top plate can be taken off the appliance

just like that.

2. At the outlet at the top, apply sealant to the

contact surface where the cover will be

positioned.

3. Install the cover using the materials.

4. At the rear, apply sealant to the contact surface

where the connection collar will be positioned.

5. Install the connection collar with the materials.

Preparing the outside air

connection

If the appliance is installed in a room without sufficient

ventilation, you can install a connecting kit on the

appliance for the outside air supply. Some of the air

inlets on the appliance must then be plugged with the

blanking material provided. We recommend applying a

connection set that has a valve you can close when

the stove is not in use.

The air supply tube is 100 mm in diameter. If the tube

is smooth, it may be no longer than 12 metres. If

accessories such as bends are used, the maximum

length (12 m) must be reduced by 1 m for each

accessory used.

1. Close the air inlet in the bottom plate with the

small cast-iron cover plates (1) and screws (2);

see following figure.

By closing the air inlet in the bottom plate you

prevent air being used for combustion from an

insufficiently ventilated space.

2. For connection to outside air via the floor:

a. Make an opening in the floor; see 'Appendix 2,

Measurements' for the correct position of the

opening.

b. Slide a straight air supply tube onto the

connection collar of the stove, so that it cannot

move; see following figure .

Subject to change because of technical improvements

9

3. For connection to outside air via the rear of the

appliance:

a. Create an opening in the base or the log

compartment by removing the panel at the

back of the base or the log compartment; see

following figures.

Depending on the version of the stove the

cover plate is affixed either with springy

clips or with a washer plate. In case of a

spring fixing use a screwdriver to lift the

cover plate out of its groove.

b. Connect a so-called 'elbow' hermetically to the

opening in the base or the log compartment so

that it cannot move; see following figure.

The height for the connection through the

wall may vary depending on the elbow

type.

10

Subject to change because of technical improvements

EN 1856-2

DIN 1298

Ø100 - 90°

09-20001-017

Installing and connecting

1. Position the stove in the correct place, and make

sure it is level.

2. Connect the appliance airtight to the flue

(chimney).

3. In the case of connection to outside air: connect

the outside air supply to the connection collar

within the base or log compartment of the stove or

to the fitted elbow.

4. Re-position all removed parts in the correct places

in the stove.

Never light a fire in the appliance without the

fireproof inner plates.

The appliance is now ready for use.

Use

First use

When you use the stove for the first time, make an

intense fire and keep it going for a good few hours.

This will cure the heat-resistant paint finish. This may

result in some smoke and odours. You could open

windows and doors for a while in the area in which the

stove is located.

Fuel

The appliance is suitable for the burning of natural

wood; sawn and chopped wood that is sufficiently dry.

The appliance is also suitable for the burning of brown

coal briquettes and anthracite coal.

Do not use other fuels, as they can cause serious

damage to the stove.

You are not allowed to use the following fuels, as they

pollute the environment and because they heavily soil

the appliance and flue, which may lead to a chimney

fire:

Treated wood, such as scrap wood, painted wood,

impregnated wood, preserved wood, plywood and

chipboard.

Plastics, scrap paper and domestic waste.

Wood

Hardwood, such as oak, beech, birch and fruit tree

wood is the ideal fuel for your stove. This type of

wood burns slowly with calm flames. Softwood

contains more resins, burns faster and sparks

more.

Use seasoned wood that contains no more than

20% moisture. The wood should have been

seasoned for at least 2 years.

Saw the wood to size and split it while it is still

fresh. Fresh wood is easier to split, and split wood

dries more easily. Store the wood under a roof

where the wind has free access.

Do not use damp wood. Damp logs do not produce

heat as all the energy is used in the evaporation of

moisture. This will result in a lot of smoke and soot

deposits on the stove door and in the chimney. The

water vapour will condense in the stove and can

leak away through chinks in the stove, causing

black stains on the floor. It may also condense in

the chimney and form creosote. Creosote is a

highly flammable compound and may cause a

chimney fire.

Brown coal briquettes

Brown coal briquettes have approximately the same

burning characteristics as wood.

Ensure there is a good charcoal bed before you

start burning brown coal briquettes.

For lighting the fireplace, follow the instructions in

the "Lighting" paragraph.

Subject to change because of technical improvements

11

Anthracite coal

Anthracite coal is categorised on the basis of

properties, sometimes prescribed by law, such as the

percentage of volatile substances. The ash content of

anthracite coal is between 3% and 13%. The lower the

ash content, the higher the net heating value and the

less often you have to remove ash.

Preferably use category A anthracite coal with a

low ash content.

Use the recommended size 12/22 or 20/30.

For lighting the fireplace, follow the instructions in

the "Lighting" paragraph.

Lighting

You can check whether the flue has sufficient draught

by lighting a ball of paper above the baffle plate. A cold

flue often has insufficient draught and consequently,

some smoke may escape into the room instead of up

the chimney. You can avoid this problem by lighting

the fire as described below.

1. Stack two layers of medium sized logs crosswise.

2. Stack two layers of kindling crosswise on top of

the logs.

3. Place a firelighter cube in the lower layer of

kindling and light the cube according to the

instructions on the packaging.

4. Close the door of the appliance and open the

primary air inlet and open the secondary air inlet of

the appliance; see 'Controlling air combustion'.

5. Allow the fire develop into a good blaze until there

is glowing bed of charcoal. You can then add fuel

and adjust the appliance, see the chapter "Stoking

with wood".

Burning wood

After you have followed the instructions for lighting :

1. Slowly open the stove door.

2. Spread the charcoal evenly across the bottom of

the stove base.

3. Stack a few logs on the charcoal.

Open stacking

If the logs are stacked openly, the wood will burn

quickly as the oxygen can reach each log easily. If

you want to use the stove for a short while, make an

open stack.

12

Subject to change because of technical improvements

Compact stacking

If the logs are stacked tightly, the wood will burn more

slowly as the oxygen can only reach some logs

easily. If you want to burn wood for a longer period,

make a compact stack.

4. Close the door of the appliance.

5. Close the primary air inlet and leave the secondary

air inlet open.

Fill the appliance up to one third capacity.

Burning brown coal

briquettes

Brown coal briquettes burn in almost the same way as

wood. Using the primary air inlet, ensure sufficient

supply of air under the fire. For further information see

the paragraph "Burning wood".

Burning brown coal briquettes creates a lot of ash.

Regularly remove excess ash. See the paragraph

"Removing ashes" for instructions.

For the properties and use of brown coal

briquettes: consult your brown coal briquettes

supplier or see the brown coal briquettes'

packaging.

After you have followed the instructions for lighting:

1. Slowly open the stove door.

2. Spread the charcoal evenly across the bottom of

the stove base.

3. Place the brown coal briquettes on the charcoal

bed.

4. Close the door.

5. Regularly remove ashes from the stove base

riddling the grate. Use the cold handle to operate

the riddling rod.

Burning anthracite coal

Always close the secondary air slide when

burning anthracite coal.

Set the fuel choice air valve to the closed

position.

After you have followed the instructions for lighting:

1. Open the primary air slide completely.

2. Slowly open the stove door.

3. Spread the charcoal evenly across the bottom of

the stove base.

4. Spread a shovelful of coal on the charcoal bed and

wait with the next shovelful until the coals start to

glow.

5. Now add more coal.

Be careful not to smother the fire by adding too

much coal at once.

You have added as much as you can once the

glow of the previous load is only just visible.

6. Close the door.

7. Allow the coals to burn well for a few minutes and

control the air supply using the primary air slider.

If the fire basket or the cast-iron plates start to

glow red you have overfed the fire.

8. Regularly remove ashes from the stove base

riddling the grate. Use the cold handle to operate

the riddling rod.

Subject to change because of technical improvements

13

Controlling combustion air

The appliance has various features for air control; see

following figure.

1.

The primary air slide is open in pulled out

position and closed in pushed back position.

2.

The secondary air slide is open in pulled out

position and closed in pushed back position.

The primary air slide controls the air flow under the

grille (1);see following figure.

The secondary air slide controls the air flow for the

glass and the vents in the back wall (2).

Advice

Never burn wood with an open door.

Regularly burn wood with intense roaring fires.

If you frequently have low intensity fires, tar

and creosote may be deposited in the chimney

. Tar and creosote are highly combustible

substances. Thicker layers of these

14

Subject to change because of technical improvements

substances may catch fire if the temperature in

the chimney increases suddenly. By allowing

the fire to burn very intensely regularly, layers

of tar and creosote will disappear.

Low intensity fires also cause tar deposits on

the stove window and door.

When the outside temperature is not very low,

it is better to burn wood intensely for a few

hours instead of having a low intensity fire for a

long period of time.

Control the air supply with the secondary air inlet.

The secondary air inlet not only supplies air to

the fire but to the glass as well, so that it does

not quickly become dirty.

Open the primary air inlet for the time being if the air

supply by the secondary air inlet is inadequate or if

you want to fan the fire.

It is better to add a small amount of logs regularly

than to add many logs at the same time.

Extinguishing the fire

Do not add fuel and just let the fire go out. If a fire is

damped down by reducing the air supply, harmful

substances will be released. For this reason, the fire

should be allowed to go out naturally. Keep an eye on

the fire until it has gone out. All air inlets can be closed

once the fire has died completely.

Removing ashes

After the wood has been burnt, a relatively small

amount of ashes is left over. This bed of ashes is a

good insulating layer for the stove base plate and

improves combustion. It is good to leave a thin layer

of ashes on the stove base plate.

The flow of air through the fire plate must not be

obstructed, however, and no ash may be allowed to

accumulate behind a cast-iron inner plate. Remove

the excess ash regularly.

After the brown coal briquettes and anthracite coal

has been burnt, a relatively large amount of ash is left

over. No ash may be allowed to accumulate

underneath the fire grate and the ash should never

reach the bottom of the grate. This will cause the grate

to overheat and be damaged.

1. Use the riddling rod to free the grate of excess

ashes.

If the appliance is still warm, use the "cold

hand" to operate the riddling rod.

2. Open the stove door.

3. Using the scraper, sweep the remaining ashes

through the grid.

4. Remove the ashtray (see next figure) using the

glove provided and empty the ashtray.

5. Replace the ash pan and close the stove door.

Fog and mist

Fog and mist hinder the flow of flue gases through the

flue. Smoke can blow back and cause a stench. If it is

not strictly necessary, it is better not to use the stove

in foggy and misty weather.

Subject to change because of technical improvements

15

problems

Refer to the appendix "Diagnostic diagram" to resolve

any problems in using the stove.

To reach the nominal output, approximately 2

kg of fuel needs to be burnt every 45 minutes.

Maintenance

Follow the maintenance instructions in this chapter to

keep the stove in good condition.

Chimney

In many countries, you are required by law to have

your chimney checked and maintained.

At the beginning of the heating season: have the

chimney swept by an expert.

During the heating season and after the chimney

has not been used for a long time: have the

chimney checked for soot deposits.

After the heating season: seal off the chimney with

a ball of paper.

Cleaning and other regular

maintenance activities

Do not clean the stove when it is still warm.

Clean the exterior of the stove with a dry lint-free

cloth.

You can clean the stove interior thoroughly at the end

of the heating season:

If necessary, first remove the fire-resistant inner

plates. See the chapter "Installation" for

instructions on removing and installing the inner

plates.

If necessary, clean the air supply ducts. Remove

the top plate to this end. The top plate lies loosely

on the appliance.

If required, remove the baffle plate at the top of the

appliance and clean it.

Remove and install baffle plate

Unscrew the clamping plate on the front of the baffle

plate. Lift the baffle plate from the support and tilt the

baffle plate out of the appliance. Please ensure that

the rear of the baffle plate properly connects to the air

tunnel at the back of the appliance when reinstalling.

1

09.20019.034

Checking fire-resistant inner plates

The fire-resistant inner plates are consumables and

subject to wear . Vermiculite inner plates are fragile.

Do not knock the inner plates with logs. Check the

fire-resistant inner plates frequently and replace them

when necessary.

See the chapter "Installation" for instructions on

removing and installing the inner plates.

The insulating vermiculite or chamotte inner

plates may develop hairline cracks, but this

does not affect their performance adversely.

Cast-iron inner plates last a long time if you

remove frequently the ash that can accumulate

behind them. If accumulated ash behind the

cast-iron plate is not removed, the plate will no

longer be able to dissipate the heat to the

surroundings and this may cause the plate to

warp or crack.

Never use the stove without the fire-resistant

inner plates.

Cleaning glass

Dirt clings less easily to well-cleaned glass. Proceed

as follows:

16

Subject to change because of technical improvements

1. Remove dust and loose soot with a dry cloth.

2. Clean the glass with stove glass cleaner:

a. Apply stove glass cleaner to a kitchen sponge,

rub down the entire glass surface and give the

cleaning agent time to react.

b. Remove the dirt with a moist cloth or kitchen

tissue.

3. Clean the glass again with a normal glass cleaning

product.

4. Rub the glass clean with a dry cloth or kitchen

tissue.

Do not use abrasive or aggressive products to

clean the glass.

Wear household gloves to protect your hands.

If the glass in the appliance is broken or

cracked, it must be replaced before you can

use the appliance again.

Make sure that no stove window cleaner runs

between the glass and the cast-iron door.

Lubrication

Although cast-iron is slightly self-lubricating, you will

still need to lubricate moving parts frequently.

Lubricate the moving parts (such as guide

systems,hinge pins, latches and air slides) with

heat resistant grease that is available in the

specialist trade.

Touching-up the paint finish

Small areas of damaged paint finish can be touched-

up with a spray can of special heat-resistant paint,

available from your supplier.

Areas of damaged enamel can be touched up with a

special heat-resistant paint finish that is available

from your supplier.

Checking the seal

Check whether the door sealing rope is still in good

condition and works well. The sealing rope is

subject to wear and will need to be replaced over

time.

Check the appliance for air leaks. Close any

chinks with stove sealant.

Allow the sealant to harden fully before lighting

the stove, as any moisture in the sealant will

form bubbles, resulting in a new air leak.

Subject to change because of technical improvements

17

Appendix 1: Technical Data

Model

Astro 3MF

Astro 4MF

Fire regime Non continuous use

Nominal output 8 kW

Chimney connection (diameter) 150 mm

Weight +/- 140 kg

Recommended fuel Wood

Brown coal

briquettes

Anthracite

coal

Fuel property max. 33 cm 3" - 6" - 7"

12/22

20/30

Mass flow of flue gases 7.4 g/s 6.1 g/s 7.3 g/s

Flue gas temperature in measurement sec-

tion

297 ℃ 252 ℃ 261 ℃

Temperature at the appliance outlet 351 ℃ 454 ℃ 321 ℃

Minimum draught 12 Pa 12 Pa 12 Pa

CO emission (13%O

2

) 0,09 % 0,04 % 0,10 %

NOx emission (13%O

2

) 123 mg/Nm³ 151 mg/Nm³ 123 mg/Nm³

CnHm emission (13%O

2

) 71 mg/Nm³ 28 mg/Nm³ 90 mg/Nm³

Particulate emission 18 mg/Nm³ 17 mg/Nm³ 15 mg/Nm³

Efficiency 76,7 % 82,8 % 80,0 %

18

Subject to change because of technical improvements

Model

Astro 3MF

Astro 4MF

Fire regime Continuous use

Nominal output 8 kW

Chimney connection (diameter) 150 mm

Weight +/- 140 kg

Recommended fuel Brown coal briquettes Anthracite coal

Fuel property 3" - 6" - 7"

12/22

20/30

Mass flow of flue gases 7 g/s 8.6 g/s

Flue gas temperature in the measurement section 252 ℃ 247 ℃

Temperature at the appliance outlet 440 ℃ 301 ℃

Minimum draught 12 Pa 12 Pa

CO emission (13%O

2

) 0,13 % 0,16 %

NOx emission (13%O

2

) 161 mg/Nm³ 116 mg/Nm³

CnHm emission (13%O

2

) 45 mg/Nm³ 85 mg/Nm³

Particulate emission 5 mg/Nm³

Efficiency 79,8 % 79,5 %

Subject to change because of technical improvements

19

Appendix 2: Measurements

ASTRO 3MFP

20

Subject to change because of technical improvements

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